CVE catalog

CVE-2026-4870

IBM Qiskit SDK 0.43.0 through 2.5.0 could allow an…

[CVE catalog]

IBM Qiskit SDK 0.43.0 through 2.5.0 could allow an attacker to trigger a segmentation fault leading to a denial of service due to uncontrolled recursion in the parser.

Severity
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
Source
[NVD] · [CVE record]
EPSS
0.27% · Oct 27, 2026

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "qiskit_software_development_kit",
      "ecosystem": "cpe",
      "fixed_version": "1.4.6"
    },
    {
      "name": "qiskit_software_development_kit",
      "ecosystem": "cpe",
      "fixed_version": "2.4.2"
    },
    {
      "name": "qiskit_software_development_kit",
      "ranges": [
        {
          "fixed": "2.4.2",
          "introduced": "2.0.0",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "2.4.2",
      "provider_record_id": "NVD-CVE-2026-4870"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

Observed:

References

[FIRST EPSS] · [National Vulnerability Database (NVD)]